/*-
 * Copyright (c) 2011 Ondrej Fischer <ondrej.fischer@gmail.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#include "mutex.hpp"


namespace express {


    void Mutex::check_exception(int return_code) {
        if(0 != return_code) throw new MutexException(return_code);
    }


    Mutex::Mutex(Type type)
    : mutex(new pthread_mutex_t()), attr(new pthread_mutexattr_t)
    {
        check_exception(pthread_mutexattr_init(attr));
        check_exception(pthread_mutexattr_settype(attr, type));
        check_exception(pthread_mutex_init(mutex, attr));
    }


    Mutex::~Mutex() {
        check_exception(pthread_mutex_destroy(mutex));
        check_exception(pthread_mutexattr_destroy(attr));
    }


    void Mutex::lock() {
        check_exception(pthread_mutex_lock(mutex));
    }


    void Mutex::unlock() {
        check_exception(pthread_mutex_unlock(mutex));
    }


    Mutex::Condition* Mutex::condition() {
        return new Condition(this);
    }


    void Mutex::Condition::check_exception(int return_code) {
        if(0 != return_code) throw new ConditionException(return_code);
    }


    Mutex::Condition::Condition(Mutex* mutex)
    : _mutex(mutex), cond(new pthread_cond_t())
    {
        pthread_cond_init(cond, PTHREAD_COND_INITIALIZER);
    }


    Mutex::Condition::~Condition() {
        check_exception(pthread_cond_destroy(cond));
    }


    void Mutex::Condition::wait() {
        check_exception(pthread_cond_wait(cond, _mutex->mutex));
    }


    void Mutex::Condition::signal() {
        check_exception(pthread_cond_signal(cond));
    }


    void Mutex::Condition::broadcast() {
        check_exception(pthread_cond_broadcast(cond));
    }


    Mutex* Mutex::Condition::mutex() {
        return _mutex;
    }


}

